How to install GNU/Linux in Chrome Book

An article written by PC Format, published in tecradar magazine describes the steps for installing GNU/Linux operating system in Chrome book.

For the type of user Chromebooks are generally aimed at, it does
exactly what it needs to do. It's fast and easy to use - what more could
you ask for? Well, you may find yourself missing some of the features
associated with more traditional operating systems.

Don't worry,
help is at hand, in the form of Crouton. Crouton is a set of programs
that create a chroot environment within Chrome OS, from which you can
run a Linux OS, with Debian and Ubuntu currently supported.

A
chroot is not the same as a virtual machine - you're still running on
the standard OS, but within a new environment. This has several
advantages. It doesn't touch the existing OS installation, making
reversal easy; it uses the Chrome OS drivers, so there are no
compatibility issues; and it's written by the Chrome